190 HELIX, HIPPOBOSCA. 



or skin ; whorls 7, crossed on the spire by curv 

 ed wrinkles and somewhat on the body ; aper- 

 ture subovate, about a tbird as long as the shell. 

 Length about an inch, breadth more than equal 

 to a third of the length. A Buccinium of 

 Gnielin, 



a, shell subconic, with six rounded whorls* 

 suture impressed ; olive or pale,, having three 

 reddish-brown bands ; aperture suborbicular, 

 equalling about half the length of the shell, 

 Length about an inch, breadth about two-thirds 

 as much. 



decisa, shell subconic, olive ; apex minute, whorls 

 four, wrinkled across and banded with minute 

 distant strise ; terminal whorl very short ; su- 

 ture impressed ; aperture subovate, about half 

 the length of the shell ; bluish-white within. 

 Length about an inch, breadth about three 

 fourths as great. 

 See MS. P. 



8 8. HEMEROBIUS. Spec. 4. 



ptilsatorium, (false death-watch,) mostly wingless : 

 abdomen oblong ; mouth red ; eyes yellow. 

 The female makes a noise like the ticking of & 

 watch, or like the Ptinus pulsator. 



See MS. P. 



8 12. HIPPOBOSCA. Spec. 5. 



equine (horse-fly,) wings obtuse ; thorax varie- 

 gated ; feet armed with four claws ; head 

 brown ; wings crossing. 



ovina, (sheep-bug,) destitute of wings ; body dull 

 testaceous. 

 See MS, P* 



